Water Treatment
Compact, advanced electric water purification systems for whole-house and drinking-water applications
Navien Home Water System manages all the water flowing through your home, from your whole-house supply to every glass of drinking water, making it cleaner and safer for your family.
WEC(Whole-House Water)
WEC effectively reduces scale-forming ions, extending the lifespan and increasing the energy efficiency of your home appliances, while significantly reducing concerns about hard water stains(limescale).
WUR and WUA(Drinking Water)
WUR and WUA work together to filter out various harmful substances from your drinking water, providing you with safe and pure water you can trust.


Globally Tested and Certified
for Excellence in Reliability
and Quality
The Navien Water Treatment System meets global standards, holding major U.S. certifications such as NSF/ANSI, ETL, and FCC, along with various design awards.
Recognized for its safety and reliability, the system stands as a premium water treatment solution.
International Certifications and Standards
- WEC600 : NSF 42, 61, 372 & IAPMO Z601
- WUR500 : NSF 58, 372(Smart Faucet is certified for NSF61, 372 and Inlet T-Valve is certified for NSF372)
- WUA500 : NSF 42, 53, 372, 401(Smart Faucet is certified for NSF61, 372 and Inlet T-Valve is certified for NSF372)
Verified Safety and Quality
ETL Listed Mark Compliance with North American safety standards, FCC – EMC and Telecom compliance
Global design award winner
Recognized as a finalist at the International Design Excellence Awards(IDEA) and received
the Red Dot Design Award
Navien Water Treatment
Core Technologies
No salt, No tank. Compact electric solution

Using advanced electro-CDI technology, WEC significantly reduces total dissolved solids(TDS), hardness minerals, and other contaminants, all without the need for salt.
NDI dual module design

The proprietary WEC NDI dual-module design enables continuous on-demand optimized water without interruption during regeneration.
Water filtration system

Navien’s water filtration lineup features two distinct technologies.
The WUR500 uses reverse osmosis to filter particles as small as 0.0001 microns, delivering high-purity drinking water. The WUA500 applies a high-performance compressed carbon block filter that preserves essential minerals while enhancing taste and freshness.
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Home Water System Line-up
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